岳城煤矿9#、15#煤层承压开采可行性评价研究

Feasibility evaluation of pressure mining in 9#, 15# coal seams of Yuecheng Coal Mine

针对岳城煤矿下伏奥陶系灰岩岩溶裂隙含水层富水性强,必须承压开采等现状,结合矿井条件进行了9#、15#煤层承压开采可行性评价,并制定了合理留设保水煤柱、严格探放水、疏水降压、注浆改造等改善措施。结果表明:9#煤层全矿划分为安全区,可以承压开采。15#煤层巷道可以正常掘进,但存着局部富水区段由导水断层和陷落柱诱发突水,应在后续探放水工作中加强探测。

In view of the current situation that the underlying Ordovician limestone karst fissure aquifer in Yuecheng Coal Mine is rich in water and must be exploited under pressure, combined with the mine conditions, the feasibility evaluation of 9#, 15# coal seam confined mining is carried out, and the improvement measures such as reasonable retention of water retaining coal pillar, strict water exploration and drainage, drainage and pressure reduction, grouting transformation and so on are formulated. The results show that the 9# coal seam is divided into safety zones and can be mined under pressure. 15# coal seam roadway can be excavated normally, but there is water inrush induced by water diversion fault and collapse column in local water rich section, so the detection should be strengthened in the follow-up water exploration and drainage work.